Table 1.

Average annual percent change in the incidence rate for PTSD prior to and following the initiation of Combat Operations in Iraq

Item	Baseline 1999–2002			During OIF 2003–2008
	Annual change (%)	95% CI	p	Annual change (%)	95% CI	p
All active-dutya	5.0	1.9, 8.3	0.002	43.0	40.6, 45.6	< 0.001
Sexb
Female	−1.3	−5.1, 2.6	0.496	15.6	12.5,18.7	< 0.001
Male	10.4	6.4, 14.4	< 0.001	53.8	50.9,56.8	< 0.001
Ageb
< 20	−4.7	−11.5, 2.6	0.205	12.4	6.3, 18.8	< 0.001
20–24	4.8	0.1, 9.7	0.045	40.4	36.8, 44.1	< 0.001
25–29	8.6	1.6, 16.1	0.015	47.8	42.5, 53.3	< 0.001
30–34	9.1	0.0, 19.0	0.049	48.1	41.2, 55.4	< 0.001
35–40	8.0	−2.3, 19.3	0.133	53.7	45.3, 62.6	< 0.001
> 40	8.0	−3.4, 20.8	0.178	50.7	42.0, 59.8	< 0.001
Raceb
Black	3.3	−3.9, 11.1	0.374	44.8	38.6, 51.2	< 0.001
Other	8.9	−0.3, 18.9	0.059	45.3	38.6, 52.4	< 0.001
White	4.8	1.0, 8.7	0.012	42.3	39.4, 45.3	< 0.001
Marital Statusb
Married	11.5	6.6, 16.5	< 0.001	48.6	45.1, 52.2	< 0.001
Other	4.5	−7.4, 17.9	0.479	41.3	31.7, 51.5	< 0.001
Single	−0.9	−4.9, 3.3	0.669	35.4	32.0, 38.9	< 0.001
Rankb
E1-E4	2.6	−1.0, 6.3	0.156	35.4	32.5, 38.3	< 0.001
E5-E9	9.4	3.3, 15.9	0.002	56.3	51.6, 61.1	< 0.001
O1-O3	8.9	−7.5, 28.3	0.305	42.9	30.6, 56.3	< 0.001
O4-O9	26.8	1.6, 58.4	0.036	35.0	21.8, 49.6	< 0.001
Serviceb
Army	8.2	3.7, 12.8	< 0.001	53.2	49.8, 56.7	< 0.001
Marines	14.5	5.0, 24.9	0.002	50.7	44.2, 57.5	< 0.001
Navy	−3.0	−7.8, 2.0	0.228	21.6	17.4, 25.9	< 0.001
Air Force	6.8	0.3, 13.6	0.039	23.0	18.4, 27.9	< 0.001

^a Adjusted for sex, age, race, marital status, military rank, and branch of military service; ^b Adjusted for all other variables in the table